View Full Version : Rem 1100 function check? New o-ring

April 10, 2011, 05:10 PM
My brother asked me to clean his 1100 as is was misfiring to the point of being unusable. The O-ring was stretched out and brittle so I am assuming this was the problem.
I changed the ring and cleaned the gun. Is there a function check on the 1100?
I don't have the ability to fire a round and I am not familiar with this weapon at all.

Harry Callahan
April 10, 2011, 05:28 PM
Check this out. Thoroughly take it apart and clean/lube everything. It's easy and fun once you've done it a few times.


.300 Weatherby Mag
April 10, 2011, 06:46 PM
Did you clean the fowling out of the gas ports?

April 10, 2011, 08:00 PM
I did not know there were "gas ports".

Harry Callahan
April 10, 2011, 10:30 PM
The ring that is part of the barrel has them inside it. Very important these stay clean otherwise cycling will be a problem.

.300 Weatherby Mag
April 10, 2011, 10:34 PM
These have to be clean for it to work consistently...


April 10, 2011, 10:57 PM
The most common mistakes when cleaning the R-1100 have to due with the gas system. If the O-ring is questionable, replace it. If the gas system isn't clean and happy then the gun won't be happy and neither will you.

As 300WM mentioned, don't forget to clean the gas vent hole/s -- they're in the barrel located inside the gas cylinder (the barrel collar). There are special punches for the job, but a 1/16" wire will work.
The magazine tube needs to be clean and lightly oiled so the piston and piston seal (the rings) are free to slide.
The piston and piston seal (the rings) must be installed in the proper orientation, see below.


April 11, 2011, 07:53 AM
To add one thing to Zippy's post - DON'T get oil on that o-ring, or you'll be replacing them more frequently - I learned that the hard way

April 11, 2011, 11:58 AM
My friend, oneounceload, is correct. The O-ring is much happier if not swimming in oil. Also, the mag tube may be a weak link in the 1100's gas system: If it's over oiled it collects muck and it it's under oiled it corrodes -- clean it, oil it and wipe it. IIRC, one of the improvements in the 11-87 was changing the tube to stainless steel. Open the bolt and turn a freshly serviced 1100/11-87 end over end, you should hear the rings freely sliding by the force of gravity.

April 11, 2011, 12:18 PM
When I had my 28n gauge 1100, the directions said to run it dry. Not listening is how I found out about the o-ring. But I also discovered using some Remington dry lube worked well with the brass gas piston parts

April 11, 2011, 02:24 PM
So I have it all cleaned, except for the gas ports, and have a new o-ring installed. Thanks for the help.
Would any of this affect the firing mechanism? He said it wasn't jamming; the firing pin wasn't striking the round. He just assumed it was dirty. It would chamber a round and then "click" - misfire.
This is from an estate sale collection and is a gun that got a lot of use.

April 11, 2011, 03:32 PM
Is the hammer dropping? You can see it inside the action spring up when you pull the trigger. Otherwise, when mine acted up, the firing pin retraction spring inside the bolt was broken - it is a small and fine spring. Three packs from Wolff aren't that expensive

April 11, 2011, 03:46 PM
I will check the hammer tonight, but since it is an intermittent problem, I doubt it is broken.

April 11, 2011, 04:06 PM
You can easily see the firing pin retraction spring when you take the chromed bolt out - just turn it over - I had one broken in three places that did the same thing - intermittently -

April 11, 2011, 05:56 PM
All these gas gun issues / o-ring issues/cleaning out gas port talk ....just makes me want to go home and pet my Benelli Inertia guns a little ...:p

( Sorry, couldn't resist ) ....:D....

but these guys will certainly help you out ..../ help you get it fixed ...

April 11, 2011, 08:13 PM
If not a broken firing pin retraction spring.

Try spraying the firing pin channel with some brake cleaner. Using the plastic straw that comes with the brake cleaner makes it easier for pin-point application. Then, if you have access to an air compressor, blow out the channel with air. May be some old residue,gunk in the channel randomly hanging up the firing pin.